Hi, Seeing as the last summary was useful I thought I'd send out some fresh notes:
Alex discussed his barrier tests which where posted to the list last week. There is some behaviour that needs explaining w.r.t to barrier only approaches which should fail in real hardware but don't. Alvise prompted he notices the Load Acquire/Store Release semantics were new for ARMv8 and Alex replied we'd need to look at the barrier stuff later but they likely need testing on non-x86 backends where we'll need to be careful to express full barrier semantics. Fred talked about progress on the main patch set which is re-based on the recent -rc0 release. He hopes to post the latest set of patches this week. Alvise also expects to post updated patch series for the atomic/exclusive code this week. He's maintaining two trees at the moment, one based direct off mainline QEMU and then a MTTCG aware version. There was some discussion about how to proceed with the other backends. The general consensus was as long as the patches didn't break the other builds we could submit to the mainline list and ask for help from other TCG experts. The changes are expected to be fairly mechanical. There was some general discussion about the current status of MTTCG and the consensus was we are generally happy with the functionality. There where a number of comments about making the MTTCG build friendly to being disabled on different platforms (v4 was broken on non-x86/non-arm). We shall see what the community thinks once the next set of patches goes out. Mark asked for advanced copies of the presentation Alex is giving at KVMForum and he replied he'd hope to get wider circulation this week after an internal review. He would also contact Fred offline to discuss the demo options for the talk. Finally it was agreed with KVM Forum only 2 weeks away to have the next conference on Monday. -- Alex Bennée
